Magnetic nanocomposite based on polyacrylic acid and carboxylated cellulose nanocrystal for the removal of cationic dye

• DOI: 10.1039/d0ra00604a
• Publication Date: 2020-03-24T11:29:40Z
• Authors: Rajib Samadder; Nahida Akter; Abinash Chandra Roy; Md. Mosfeq Uddin; Md. Jahangir Hossen; Md. Shafiul Azam
• Keywords: Polyacrylic acid; Cationic polymerization

The development of safe and cost-effective methods for the treatment dye polluted wastewater has been a great concern among researchers. Herein, we developed nanocomposite (M3D-PAA-CCN) based on polyacrylic acid (PAA) crosslinked with magnetic 3D crosslinkers (M3D) carboxylated cellulose nanocrystals (CCN), removal cationic dyes from aqueous solutions. Acrylic-functionalized Fe3O4 nanoparticles were covalently linked to polymer chains via form crosslinker introduce properties into as-synthesized nanocomposite. addition highly dispersive CCN reduced gel-like instead incorporated diffusive nature, which was more desirable adsorbents. surface morphology analyzed by FESEM size particles found be in range 60-90 nm. chemical functionalities compositions determined XPS, FTIR, EDX analyses whereas TGA confirmed thermal stability M3D-PAA-CCN. maximum adsorption capacity M3D-PAA-CCN (332 mg g-1) measured higher than that M3D-PAA (114 methylene blue (MB) indicating significant contribution CCN. pH-dependent increased increase pH owing greater negative charge as indicated zeta potential. kinetics MB composites follow pseudo-second-order model. also investigated function concentration figure out mechanism using Langmuir Freundlich isotherm models. model fitted process better suggested relatively smaller nonlinear chi-square value obtained fitting parameters.